Coenzyme q10-containing composition

ABSTRACT

The coenzyme Q 10 -containing liquid composition is obtained by dispersing and emulsifying coenzyme Q 10  in an aqueous liquid containing a water-soluble substance consisting of octenylsuccinate starch and dextrin, and glycerin. The liquid composition may be dried to prepare a coenzyme Q 10 -containing solid composition.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. patentapplication Ser. No. 11/632,933, filed on Jan. 19, 2007, which is anational phase filing of International Application No.PCT/JP2005/015071, filed on Aug. 18, 2005, which claims priority toJapanese Patent Application No. 2004-243257, filed on Aug. 24, 2004, allof which are incorporated herein in their entirety by reference thereto.

BACKGROUND

1. Field of the Disclosure

The present disclosure relates to a coenzyme Q₁₀-containing compositionobtained by dispersing and emulsifying coenzyme Q₁₀ in an aqueous liquidcontaining a water-soluble substance and a polyhydric alcohol. Morespecifically, the disclosure relates to a composition obtained bydispersing and emulsifying coenzyme Q₁₀ in an aqueous liquid containinga water-soluble substance consisting of octenylsuccinate starch anddextrin, and glycerin as the polyhydric alcohol. The composition cancontain coenzyme Q₁₀ at a high content, and has excellent stability andbioavailability.

2. Discussion of the Background Art

Coenzyme Q₁₀ is a type of coenzyme Q (molecular formula: C₅₉H₉₀O₄,molecular weight: 863.36) found in higher animals, and it is also knownas ubidecarenone. Coenzyme Q₁₀ is not only bioactive as a coenzyme, butis also known as a vitamin-like substance having an effect of improvingoxygen utilization efficiency. In addition to acting on congestivetissue, Coenzyme Q₁₀ is believed to also stabilize biological membranesand exhibit antioxidant and other effects, while it has been clinicallyshown to have pharmacological effects that ameliorate symptoms ofangina, cardiac failure, ischemic heart disease and muscular dystrophy.It has, in addition, been reported to be effective for prevention andtreatment of hypertension, arteriosclerosis, heart disease, diabetes andperiodontal disease, as well as for prevention of carcinostatic orpsychotropic agent side-effects, and for fatigue refreshment and motorfunction recovery. Coenzyme Q₁₀ is highly bioactive and highly safe forthe human body.

In recent years, coenzyme Q₁₀ has been approved for use as a food, andis becoming important as a material for health foods.

However, coenzyme Q₁₀ is a lipophilic solid with a low melting point andhardly soluble in water. The bioavailability of orally ingested coenzymeQ₁₀ is therefore very low. Also, coenzyme Q₁₀ is unstable and decomposesunder light to produce hydroquinones, ubichromenol and the like.

As a composition providing increased bioavailability of coenzyme Q₁₀there has been proposed a coenzyme Q₁₀-containing composition obtainedby preparing coenzyme Q₁₀ as an aqueous emulsion using a polyglycerinfatty acid ester as the emulsifier, mixing the emulsion with an aqueoussolution containing a water-soluble macromolecular substance at a weightof 3-fold with respect to ubiquinone, and spray drying the mixture(JP59-51214A). There has also been proposed production of fat-solublesubstance aqueous liquid formulations, by emulsification of afat-soluble substance such as coenzyme Q₁₀ with an emulsifier such as aglycerin fatty acid ester, sucrose fatty acid ester, polyoxyethylenesorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil orthe like, a polyhydric alcohol and water (JP2000-212066A). In addition,there has been proposed production of a coenzyme Q₁₀-containingemulsified composition obtained from coenzyme Q₁₀ using an oil-phasecomponent such as a vegetable oil or fatty acid ester, a polyhydricalcohol, and an emulsifier such as a glycerin fatty acid ester(JP2003-238396A). However, because emulsifiers such as glycerin fattyacid esters and sucrose fatty acid esters are highly viscous liquidsubstances, it is necessary to add large amounts of excipients to obtainsolid compositions from the emulsions obtained using such emulsifiers,and this not only limits the coenzyme Q₁₀ content but also lowersmanageability as a result of sticking and other problems during thedrying step. Moreover, using such emulsifiers can also impair the tasteand texture of food products, depending on the form used. In addition,since most of such emulsifiers are synthetic products they are sometimesundesirable for use. JP2003-238396A mentions water-solublemacromolecules such as starch, dextrin and gum arabic as emulsifiers,but emulsified compositions using these water-soluble macromoleculesinstead of synthetic emulsifiers have not been produced, and it isunknown whether a stable coenzyme Q₁₀-containing emulsion can beobtained by this method.

On the other hand, for dispersing and emulsifying coenzyme Q₁₀ withoutusing glycerin fatty acid esters or other synthetic emulsifiers, thereis a method of dispersing and emulsifying coenzyme Q₁₀ in an aqueousliquid containing a water-soluble substance such as gum arabic, agar,water-soluble corn fiber, starch, gelatin, xanthan gum, casein, dextrinor the like in the presence of an organic acid (JP 2003-55203A). Thismethod can provide products with high bioavailability and stability, butproducts with even higher coenzyme Q₁₀ contents are desired.

There is a method for producing emulsified powders by adding processedstarch, saccharides and water to fat-soluble substances foremulsification and then drying the mixtures, and emulsified powderedproducts have been disclosed that contain about 52% tocopherol acetate(JP11-196785A). Still, the compositions obtained when this method isapplied to coenzyme Q₁₀ are unsatisfactory from the standpoint ofemulsion stability.

Thus, a high demand remains for a coenzyme Q₁₀-containing compositionthat employs no glycerin fatty acid esters or other syntheticemulsifiers, that can include a high content of coenzyme Q₁₀, and thatcan provide high stability and bioavailability for coenzyme Q₁₀.

SUMMARY

It is an object of the present disclosure to provide a coenzymeQ₁₀-containing composition that employs no synthetic emulsifiers such asglycerin fatty acid esters, polyglycerin fatty acid esters, organic acidmonoglycerides, propylene glycol fatty acid esters, sorbitan fatty acidesters or sucrose fatty acid esters, that can include a high content ofcoenzyme Q₁₀, and that can provide high stability and bioavailabilityfor coenzyme Q₁₀.

As a result of much diligent research directed toward solving theproblems described above, the present inventors have found that by usinga composition obtained by dispersing and emulsifying coenzyme Q₁₀ in anaqueous liquid containing a water-soluble substance and a polyhydricalcohol, it is possible to produce a coenzyme Q₁₀-containing compositionwith excellent stability and bioavailability even with a high coenzymeQ₁₀ content. In particular, a highly superior coenzyme Q₁₀-containingcomposition can be obtained by using a combination of octenylsuccinatestarch and dextrin as the water-soluble substance and glycerin as thepolyhydric alcohol. In other words, the present disclosure relates to acoenzyme Q₁₀-containing liquid composition obtained by dispersing andemulsifying coenzyme Q₁₀ in an aqueous liquid containing specificamounts of a water-soluble substance consisting of octenylsuccinatestarch and dextrin, and glycerin. By drying the coenzyme Q₁₀-containingliquid composition it is possible to produce a coenzyme Q₁₀-containingsolid composition. A carrier may be used if necessary at the time ofdrying.

The coenzyme Q₁₀-containing composition of the disclosure is acomposition having a high coenzyme Q₁₀ content while also exhibitingvery high bioavailability whereby the coenzyme Q₁₀ is reliably absorbedeven when ingested on an empty stomach. Thus, the coenzymeQ₁₀-containing composition of the disclosure has a very wide range ofapplications as a material for production of various forms ofpharmaceuticals and foods with high coenzyme Q₁₀ contents, or as amaterial for addition to various foods, feeds or cosmetics.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The coenzyme Q₁₀-containing liquid composition of the disclosure isprepared by dispersing and emulsifying coenzyme Q₁₀ in an aqueous liquidcontaining specific amounts of a water-soluble substance consisting ofoctenylsuccinate starch and dextrin, and glycerin. More specifically, itis an aqueous liquid obtained by dispersing and emulsifying 1-50 wt % ofcoenzyme Q₁₀ in an aqueous liquid containing 0.01-10 wt % of glycerin,4-30 wt % of a water-soluble substance consisting of octenylsuccinatestarch and dextrin, and 40-94 wt % of water.

By drying the coenzyme Q₁₀-containing liquid composition it is possibleto produce a coenzyme Q₁₀-containing solid composition. A carrier may beused if necessary at the time of drying. A coenzyme Q₁₀-containing solidcomposition obtained by drying the aforementioned coenzymeQ₁₀-containing liquid composition without using a carrier contains 3-80wt % of coenzyme Q₁₀, 0.01-25 wt % of glycerin and 19-96 wt % of awater-soluble substance consisting of octenylsuccinate starch anddextrin. The solid composition may be placed in water to restore theliquid composition in the condition before drying.

In the coenzyme Q₁₀-containing liquid composition of the disclosure, thedispersed and emulsified coenzyme Q₁₀ particles, and specifically thedispersed and emulsified particles containing coenzyme Q₁₀, have a meanparticle size of no greater than 3 μm, more preferably no greater than 1μm and even more preferably no greater than 0.8 μm. The mean particlesize as an aqueous dispersion is stably maintained when the liquidcomposition is stored for prolonged periods.

The coenzyme Q₁₀ emulsified particles in a liquid composition obtainedby resuspending or dissolving the coenzyme Q₁₀-containing solidcomposition in an aqueous liquid likewise have a mean particle size ofno greater than 3 μm, more preferably no greater than 1 μm and even morepreferably no greater than 0.8 μm. This also applies when the liquidcomposition is directly dried or when it is adsorbed onto or supportedon a carrier. The mean particle size is stably maintained even when thesolid composition is stored for prolonged periods and then redissolvedor redispersed in an aqueous liquid.

The coenzyme Q₁₀ content in the composition of the disclosure may beappropriately set depending on the desired dosage and the form of thecomposition, but for a liquid it is in the range of 0.001-50 wt % andpreferably about 0.01-10 wt %. When the form is a solid form such aspowder or granules, the content is generally in the range of 0.01-80 wt% and preferably 0.5-60 wt %, such as about 50 wt %, for example. Theamount of coenzyme Q₁₀ to be ingested per day will differ depending onage, body weight and state of health, and may be 5-600 mg/day andpreferably 10-300 mg/day for healthy adults.

The water-soluble substance used for dispersion and emulsification ofthe coenzyme Q₁₀ acts as a protective colloid, dispersing andemulsifying the coenzyme Q₁₀ as homogeneous fine particles to maintain astable emulsion. As water-soluble substances there may be mentioned gumarabic, various starches, gelatin, xanthan gum, casein, carmellosesodium (CMC sodium), guar gum, pullulan, carrageenan,polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), carboxyvinylpolymer, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose andvegetable-derived water-soluble polysaccharides such as pectin. In orderto obtain a stable emulsion containing homogeneous, fine coenzyme Q₁₀particles, however, a combination of octenylsuccinate starch and dextrinis optimal.

As starting materials for octenylsuccinate starch there may be mentionedstarches such as tapioca starch, potato starch, corn starch, waxy cornstarch, rice starch and wheat starch. As dextrins there may be mentionedhydrolysates of the aforementioned starches, and malt dextrin and thelike.

The content of the water-soluble substance consisting ofoctenylsuccinate starch and dextrin in the coenzyme Q₁₀-containingcomposition of the disclosure will differ depending on the form of thecomposition (liquid or solid) and the coenzyme Q₁₀ content. For a liquidcomposition, it may be in the range of 4-30 wt % and preferably 10-20 wt% based on the weight of the composition. For a solid composition, itmay be in the range of 19-96 wt % and preferably 30-90 wt %. Theproportion of addition of the octenylsuccinate starch and dextrin in thewater-soluble substance may be in the range of 5-95:95-5 and preferably25-80:75-20 based on weight. If the proportion of addition of theoctenylsuccinate starch and dextrin is outside of this range, the effectof their combination will be reduced and it will not be possible toobtain the intended coenzyme Q₁₀-containing composition, i.e. ahomogeneous, fine, stable emulsion.

As polyhydric alcohols there may be mentioned glycerin, propyleneglycol, polyethylene glycol, sugar alcohols (for example, sorbitol,erythritol, mannitol, xylitol, etc.) and sugars such as glucose,fructose, sucrose, maltose and the like, but glycerin is most optimal inorder to obtain a homogeneous, fine, stable coenzyme Q₁₀-containingemulsion. A sufficient effect can be achieved when using food-gradeglycerin as well as when using pharmaceutical-grade glycerin. Theglycerin content will differ depending on the composition form (liquidor solid) and the coenzyme Q₁₀ content, but for a liquid composition itmay be in the range of 0.01-10 wt % and preferably 0.5-5 wt % based onthe weight of the composition. For a solid composition, it may be in therange of 0.01-25 wt % and preferably 0.1-10 wt %.

In order to obtain the desired coenzyme Q₁₀-containing compositionaccording to the disclosure, it is essential to combine the threecomponents, i.e. glycerin and the water-soluble substance consisting ofoctenylsuccinate starch and dextrin, during dispersion andemulsification of the coenzyme Q₁₀. If any of these three components isabsent or replaced with another component, it will either be impossibleto obtain the intended homogeneous, fine, stable coenzyme Q₁₀-containingemulsion, or problems may occur with storage stability of the emulsifiedparticles or bioavailability of the coenzyme Q₁₀.

Although octenylsuccinate starch and dextrin are used as thewater-soluble substance when the coenzyme Q₁₀ of the disclosure isdispersed and emulsified, other water-soluble substances such as gumarabic and the like may also be added in a range that does not preventthe effect.

During production of the coenzyme Q₁₀-containing composition of thedisclosure, an organic acid may also be added to the aqueous liquid tostabilize the coenzyme Q₁₀, either before or after dispersion andemulsification of the coenzyme Q₁₀ in the aqueous liquid. Examples oforganic acids include citric acid, succinic acid, fumaric acid, lacticacid, gluconic acid, malic acid, tartaric acid and their salts, amongwhich there are preferred citric acid, malic acid, tartaric acid ortheir salts, and mixtures thereof. As examples of organic acid saltsthere may be mentioned sodium salts, potassium salts, magnesium saltsand calcium salts. The amount of organic acid added will differdepending on the type of organic acid, but generally it will be in therange of 0.01-30 wt % and preferably 0.05-15 wt % based on the weight ofthe composition.

Thus, a liquid composition with addition of an organic acid contains1-50 wt % of coenzyme Q₁₀, 0.01-10 wt % of glycerin, 4-30 wt % of awater-soluble substance, 0.01-10 wt % of an organic acid and 40-94 wt %of water. A solid composition with addition of an organic acid contains3-80 wt % of coenzyme Q₁₀, 0.01-25 wt % of glycerin, 19-96 wt % of awater-soluble substance and 0.01-30 wt % of an organic acid. Thecomposition with addition of an organic acid may be used, either aloneor after dilution or concentration, as a food material, pharmaceuticalmaterial, cosmetic material or feed additive.

During preparation of the coenzyme Q₁₀-containing composition, thecoenzyme Q₁₀ as the fat-soluble agent is first melted, and thendispersed and emulsified in an aqueous liquid containing the glycerinand specific water-soluble substance, to form a fine particle emulsion.Thus, preferably an aqueous solution of the glycerin and water-solublesubstance is prepared and pre-heated. The coenzyme Q₁₀ that has beenalready heated and melted is introduced into the aqueous solution, andthen finely dispersed and emulsified to the desired mean particle sizeby publicly known means such as a high-pressure homogenizer to form ahomogeneous, fine emulsion. These steps are preferably carried out at ahigher temperature than the melting point of coenzyme Q₁₀, such as about45-90° C. and preferably 50-70° C. Alternatively, coenzyme Q₁₀ may bedirectly added and dispersed in an aqueous solution that has beenpreheated (about 45-90° C. and preferably 50-70° C.), dissolved in thesolution and then emulsified. This method is preferred for moreefficient workability and to avoid loss of the starting materials. Fordispersion and emulsification of the coenzyme Q₁₀, the coenzyme Q₁₀ maybe dissolved in or mixed with a fat or oil or an edible oil, and anorganic acid may be added during preparation of the aqueous solution forstabilization of the coenzyme Q₁₀.

The specific water-soluble substance used for the disclosure keeps thefine emulsified particles of coenzyme Q₁₀ stable from the time ofproduction of the composition of the disclosure until its ingestion andabsorption, and thus provides the advantage of promoting its uptake intothe body.

When the coenzyme Q₁₀-containing liquid composition of the disclosure isdried for solidification, any drying and solidification methods commonfor production of foods and pharmaceuticals may be used. As a fewexamples there may be mentioned a fluidized bed granulating methodwherein the liquid composition of the disclosure is sprayed onto afluidized bed that has been fluidized by heated updraft as necessary andthen dried, a stirring granulating method wherein the liquid compositionof the disclosure is dropped or sprayed onto a fluidized bed that isstirred with a stirring blade or the like, or a freeze drying method.

The liquid composition of the disclosure may be subjected to drying andsolidification methods such as spray drying, spray cooling, freezedrying or the like, without addition of a carrier, for solidificationsuch as powderization, to obtain a satisfactory solid composition thatcan form a fine stable aqueous composition when dissolved or dispersedin an aqueous liquid. If necessary, it may be adsorbed or supported on acarrier for solidification such as powderization. In this case, anycarrier may be used that is orally ingestible and can adsorb or supportthe liquid composition, and as examples there may be mentionedmicrocrystalline cellulose, β-cyclodextrin, casein or its salts,gelatin, dextrin, various starches, vegetable gums such as gum arabic,psyllium seed gum, pectin, gum arabic, xanthan gum, guar gum, agar andpullulan, hydroxypropyl cellulose (HPC), sugars (glucose, fructose,sucrose, lactose, reduced maltose and the like), silicon dioxide andsugar alcohols (for example, sorbitol, erythritol, mannitol, xylitol andthe like). The carrier may also be appropriately selected to alter thefunctional properties and characteristics of the obtained solidformulation. For example, using sorbitol, dextrin and/or mannitol as thecarrier can further increase the water solubility of the coenzymeQ₁₀-containing composition of the disclosure or the product containingit. On the other hand, using lactose, sorbitol and/or crystallinecellulose can produce a plastic deformable composition that can bedirectly tableted, or a food product containing it, for suitablepreparation of chewable tablets, swallowing tablets, tablets to bedissolved before use or effervescent tablets.

The amount of the carrier in the solid composition is in the range of10-800 parts by weight with respect to 100 parts by weight as the totalof the coenzyme Q₁₀, glycerin, water-soluble substance and the organicacid used as necessary.

When the composition of the disclosure is added to produce a productsuch as a food, pharmaceutical, cosmetic or feed, it may be combinedwith suitable vitamins and the like. As water-soluble vitamins there maybe mentioned B group vitamins and vitamin C. The B group vitaminsinclude vitamin B₁ derivatives, vitamin B₂, vitamin B₆, vitamin B₁₂,vitamin B₁₃, and various vitamin B complexes such as biotin, pantothenicacid, nicotinic acid and folic acid. Vitamin B₁ derivatives include allcompounds having vitamin B₁ physiological activity, such as thiamine andits salts, thiamine disulfide, fursultiamine and its salts,diacethiamine, bisbutytiamine, bisbentiamine, benfotiamine, thiaminemonophosphate disulfide, cycotiamine, octotiamine, prosultiamine and thelike. As fat-soluble vitamins there may be mentioned vitamin E, vitaminD and its derivatives, vitamin K₁, vitamin K₂, vitamin A, β-carotene andthe like.

According to the disclosure, the amounts of vitamins added may beappropriately set depending on their types, the form of the finalproduct and the desired dosage, but for powder or granules it willnormally be in the range of 0.001-30 wt % and preferably 0.01-10 wt %,such as about 1 wt %. For a liquid formulation or beverage it may be inthe range of 0.0001-10 wt % and preferably about 0.001-3 wt %.

When the composition of the disclosure is added to prepare variousproducts, it may be combined with added nutrients or nutritional foodmaterials including minerals such as calcium, potassium, iron, zinc andyeast or substances containing them, L-carnitine, creatine, α-lipoicacid, glutathione, glucuronic acid, taurine, collagen, soybeanisoflavone, lecithin, peptides, amino acids, γ-aminobutyric acid,diacylglycerol, DHA, EPA, medium chain fatty acid triglycerides, ediblefats and oils, capsaicin, chondroitin sulfate, agaricus blazei extract,carrot extract, garlic extract, β-glucan, aojiru, royal jelly, propolis,octacosanol, NADH, D-lipose, ceramide, hyaluronic acid, flavangenol,pycnogenol, maca, chitosan, garcinia extract, chondroitin, glucosamine,and milk proteins such as casein sodium, casein calcium, caseinmagnesium and the like. In addition, there may be suitably added andcombined flavoring components such as sugars, proteins, lipids, dietaryfiber, sweeteners, aromas, juices and the like, or aromatic componentssuch as coffee aroma, powdered tea aroma or milk aroma.

As additional components there may be included herbs such as ginkgo leafextract, grape seed extract and valerian extract, as well as galenicalssuch as ginseng, while teas such as tochu tea, oolong tea, green tea,black tea and pearl barley tea may also be added.

As food forms to which the composition of the disclosure may be added,there may be mentioned tablets, candy tablets, chewable tablets,powders, capsules, granules or fluid diets such as tube-feeding orenteral nutrients, drinks and other health foods or nutritionalsupplements, tea beverages such as green tea, oolong tea and black tea,other beverages such as soft drinks, jelly beverages, sports drinks,milk based drinks, carbonated beverages, fruit juices, lactic acidbacteria beverages, fermented milk beverages, powdered beverages, cocoabeverages and purified water, and butter, mayonnaise, shortening,margarine, custard cream, dressings, breads, rices, noodles, miso soup,tofu, milk, pasta, soups and sauces, and desserts such as biscuits andcookies, chocolate, candy, cake, ice cream, chewing gum, tablets and thelike, and yogurt. A food of the disclosure may be produced by ordinarymethods involving addition of the other food materials used in theproduction, including various nutrients, vitamins, minerals, dietaryfiber or additives, such as gustatory components, sweeteners, acidulantssuch as organic acids, stabilizers and flavorings.

When the composition of the disclosure is applied as a drug, the dosageform may be tablets, capsules, granules, powder, syrup, suspension,ointment, cream, gel, medical patch or the like. A drug according to thedisclosure may be produced according to an ordinary process withaddition of commonly used excipients, disintegrators, binders,lubricants, surfactants, alcohols, water, water-soluble macromolecules,sweeteners, taste correctives, acidulants and the like depending on thedosage form. A liquid formulation may be in the form of a solution orsuspension in water or another appropriate medium, prepared at the timeof use. Tablets and granules may also be coated by known methods.

The composition of the disclosure may also be used as a raw material orstock for feed to produce animal feeds such as livestock feeds or petfoods, for ingestion by animals such as livestock or pets. Thecomposition of the disclosure may also be applied to cosmetics such ascreams, milky lotions, lotions, lipsticks and lip creams, in the samemanner as for drugs.

A food, drug or feed containing the composition of the disclosure allowscoenzyme Q₁₀ to be efficiently ingested in an easy and reliable mannerat any time and any place. Furthermore, since the coenzymeQ₁₀-containing composition is readily water-soluble and has excellenttaste properties, it can be easily processed as a food or the like andcan be easily ingested by the elderly or by those with dysphagia.

The present disclosure will now be further explained by examples, withthe understanding that the disclosure is not limited to the examples.

EXAMPLES Example 1

After adding 800 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.), 300 g of dextrin (Matsutani Chemical Industry Co.,Ltd.) and 100 g of glycerin to 4000 g of purified water, the mixture washeated to about 60° C. To this there was added 800 g of coenzyme Q₁₀(Nisshin Pharma Inc.), and the mixture was stirred and passed through ahigh-pressure homogenizer (treatment pressure: 700 kg/cm², 3 times) toobtain a fine, homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured using a laserdiffraction/scattering particle size distribution analyzer (MICROTRACFRA; Nikkiso Co., Ltd.) and the 50% particle size was found to be 0.31μm.

Next, the emulsion was ejected into a hot air stream heated to 180° C.to remove the moisture, thereby obtaining an orange powdered compositioncontaining 40 wt % of coenzyme Q₁₀.

Example 2

After adding 800 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.), 300 g of dextrin (Matsutani Chemical Industry Co.,Ltd.), 60 g of glycerin and 40 g of malic acid to 4000 g of purifiedwater, the mixture was heated to about 60° C. To this there was added800 g of coenzyme Q₁₀ (Nisshin Pharma Inc.), and the mixture was stirredand passed through a high-pressure homogenizer (treatment pressure: 700kg/cm², 3 times) to obtain a fine, homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.41 μm.

An orange powdered composition containing 40 wt % of coenzyme Q₁₀ wasthen obtained from the emulsion in the same manner as Example 1.

Example 3

After adding 240 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.), 120 g of dextrin (Matsutani Chemical Industry Co.,Ltd.) and 24 g of glycerin to 1200 g of purified water, the mixture washeated to about 60° C. To this there was added 416 g of coenzyme Q₁₀(Nisshin Pharma Inc.), and the mixture was stirred and passed through ahigh-pressure homogenizer (treatment pressure: 700 kg/cm², 3 times) toobtain a fine, homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.39 μm.

An orange powdered composition containing 52 wt % of coenzyme Q₁₀ wasthen obtained from the emulsion in the same manner as Example 1.

Example 4

After adding 240 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.), 80 g of dextrin (Matsutani Chemical Industry Co.,Ltd.), 40 g of gum arabic (Ina Food Industry Co., Ltd.) and 24 g ofglycerin to 1200 g of purified water, the mixture was heated to about60° C. To this there was added 416 g of coenzyme Q₁₀ (Nisshin PharmaInc.), and the mixture was stirred and passed through a high-pressurehomogenizer (treatment pressure: 700 kg/cm², 3 times) to obtain a fine,homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.48 μm.

An orange powdered composition containing 52 wt % of coenzyme Q₁₀ wasthen obtained from the emulsion in the same manner as Example 1.

Example 5

After adding 240 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.), 104 g of dextrin (Matsutani Chemical Industry Co.,Ltd.), 24 g of glycerin and 16 g of malic acid to 1200 g of purifiedwater, the mixture was heated to about 60° C. To this there was added416 g of coenzyme Q₁₀ (Nisshin Pharma Inc.), and the mixture was stirredand passed through a high-pressure homogenizer (treatment pressure: 700kg/cm², 3 times) to obtain a fine, homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.44 μm.

An orange powdered composition containing 52 wt % of coenzyme Q₁₀ wasthen obtained from the emulsion in the same manner as Example 1.

Example 6

A 400 g portion of the emulsion obtained in Example 5 was powdered on afluidized bed using 2400 g of dextrin (Sanwa Cornstarch Co., Ltd.) as acarrier, to obtain an orange powdered-granulated powder composition.

Example 7

A 400 g portion of the emulsion obtained in Example 5 was powdered on afluidized bed using 1800 g of dextrin (Sanwa Cornstarch Co., Ltd.) and600 g of sorbitol (Nikken Fine Chemicals Co., Ltd.) as carriers, toobtain an orange powdered-granulated powder composition.

Comparative Example 1

After adding 800 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.) and 400 g of dextrin (Matsutani Chemical IndustryCo., Ltd.) to 4000 g of purified water, the mixture was heated to about60° C. To this there was added 800 g of coenzyme Q₁₀ (Nisshin PharmaInc.), and the mixture was stirred and passed through a high-pressurehomogenizer (treatment pressure: 700 kg/cm², 3 times) to obtain a fine,homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.33 μm.

The emulsion was then ejected into a hot air stream heated to 180° C. toremove the moisture, thereby obtaining an orange powdered composition(solid formulation).

Comparative Example 2

After adding 240 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.) and 144 g of dextrin (Matsutani Chemical IndustryCo., Ltd.) to 1200 g of purified water, the mixture was heated to about60° C. To this there was added 416 g of coenzyme Q₁₀ (Nisshin PharmaInc.), and the mixture was stirred and passed through a high-pressurehomogenizer (treatment pressure: 700 kg/cm², 3 times) to obtain a fine,homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.39 μm.

An orange powdered composition was then obtained from the emulsion inthe same manner as Comparative Example 1.

Comparative Example 3

After adding 240 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.) and 240 g of dextrin (Matsutani Chemical IndustryCo., Ltd.) to 1200 g of purified water, the mixture was heated to about60° C. To this there was added 320 g of coenzyme Q₁₀ (Nisshin PharmaInc.), and the mixture was stirred and passed through a high-pressurehomogenizer (treatment pressure: 700 kg/cm², 3 times) to obtain a fine,homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.45 μm.

An orange powdered composition was then obtained from the emulsion inthe same manner as Comparative Example 1.

Comparative Example 4

After adding 140 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.), 200 g of dextrin (Matsutani Chemical Industry Co.,Ltd.) and 140 g of lactose (DMV International) to 1400 g of purifiedwater, the mixture was heated to about 60° C. To this there was added320 g of coenzyme Q₁₀ (Nisshin Pharma Inc.), and the mixture was stirredand passed through a high-pressure homogenizer (treatment pressure: 700kg/cm², 3 times) to obtain a fine, homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.63 μm.

An orange powdered composition was then obtained from the emulsion inthe same manner as Comparative Example 1.

Comparative Example 5

After adding 800 g of gum arabic (Ina Food Industry Co., Ltd.), 340 g ofdextrin (Matsutani Chemical Industry Co., Ltd.) and 60 g of glycerin to4000 g of purified water, the mixture was heated to about 60° C. To thisthere was added 800 g of coenzyme Q₁₀ (Nisshin Pharma Inc.), and themixture was stirred and passed through a high-pressure homogenizer(treatment pressure: 700 kg/cm², 3 times) to obtain a fine, homogeneousemulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.64 μm.

An orange powdered composition was then obtained from the emulsion inthe same manner as Comparative Example 1.

Comparative Example 6

After adding 800 g of octenylsuccinate starch sodium (Matsutani ChemicalIndustry Co., Ltd.), 340 g of gum arabic (Ina Food Industry Co., Ltd.)and 60 g of glycerin to 4000 g of purified water, the mixture was heatedto about 60° C. To this there was added 800 g of coenzyme Q₁₀ (NisshinPharma Inc.), and the mixture was stirred and passed through ahigh-pressure homogenizer (treatment pressure: 700 kg/cm², 3 times) toobtain a fine, homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.81 μm.

An orange powdered composition was then obtained from the emulsion inthe same manner as Comparative Example 1.

Comparative Example 7

After adding 690 g of dextrin (Matsutani Chemical Industry Co., Ltd.),50 g of lecithin, 400 g of soybean oil and 60 g of glycerin to 4000 g ofpurified water, the mixture was heated to about 60° C. To this there wasadded 800 g of coenzyme Q₁₀ (Nisshin Pharma Inc.), and the mixture wasstirred and passed through a high-pressure homogenizer (treatmentpressure: 700 kg/cm², 3 times) to obtain a homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.72 μm.

An orange powdered composition was then obtained from the emulsion inthe same manner as Comparative Example 1. However, problems occurredfrom the standpoint of handleability in that the oil components causedsticking during spray drying of the emulsion.

Comparative Example 8

After adding 740 g of corn starch, 400 g of dextrin and 60 g of glycerinto 4000 g of purified water, the mixture was heated to about 60° C. Tothis there was added 800 g of coenzyme Q₁₀ (Nisshin Pharma Inc.), andthe mixture was stirred and passed through a high-pressure homogenizer(treatment pressure: 700 kg/cm², 3 times). However, although an emulsionwas formed immediately after treatment, it rapidly separated and it wasnot possible to maintain a homogeneous emulsion.

Comparative Example 9

After adding 400 g of hydroxypropyl starch (Nippon Starch Chemical Co.,Ltd.), 340 g of dextrin (Matsutani Chemical Industry Co., Ltd.), 400 gof casein sodium and 60 g of glycerin to 4000 g of purified water, themixture was heated to about 60° C. To this there was added 800 g ofcoenzyme Q₁₀ (Nisshin Pharma Inc.), and the mixture was stirred andpassed through a high-pressure homogenizer (treatment pressure: 700kg/cm², 3 times) to obtain a fine, homogeneous emulsion.

The particle size of the dispersed emulsified coenzyme Q₁₀-containingparticles in the emulsion was measured in the same manner as Example 1and the 50% particle size was found to be 0.75 μm.

An orange powdered composition containing 40 wt % of coenzyme Q₁₀ wasthen obtained from the emulsion in the same manner as ComparativeExample 1.

Comparative Examples 10-12

A coenzyme Q₁₀-containing emulsion was obtained in the same manner asComparative Example 9, except that acetylated phosphoric acidcrosslinked starch (Comparative Example 10), acetylated oxidized starch(Comparative Example 11) or hydroxypropylated phosphoric acidcrosslinked starch (Comparative Example 12) was used instead of thehydroxypropyl starch in Comparative Example 9. The 50% particle sizes ofthe dispersed emulsified coenzyme Q₁₀-containing particles in theemulsions were 0.62 μm (Comparative Example 10), 0.55 μm (ComparativeExample 11) and 0.48 μm (Comparative Example 12).

Orange powdered compositions containing 40 wt % of coenzyme Q₁₀ werethen obtained from the emulsions in the same manner as ComparativeExample 1.

Test Example 1 Emulsion Stability Test

After dispersing 1 g of each coenzyme Q₁₀-containing powderedcomposition of Examples 1, 2, 3 and 5 and Comparative Examples 1-4 in100 ml of water, the mean particle size of the dispersion was measuredusing a laser diffraction/scattering particle size distribution analyzer(MICROTRAC FRA; Nikkiso Co., Ltd.). The ease of dispersion in water wasevaluated by visual observation. The obtained results are shown in Table1 below. The mean particle sizes (μm) are shown in the upper row and theresults for the ease of dispersion as evaluated based on the followingscale are shown in the lower row.

−:Satisfactorily dispersed+: Time required for dispersion++: Considerable time required for dispersion(40° C. glass bottle packing), Upper row: mean particle size (μm)

TABLE 1 Storage period Sample Initial Week 2 Week 4 Week 6 Example 10.31 0.30 0.32 0.36 − − − − Example 2 0.41 0.43 0.42 0.44 − − − −Example 3 0.39 0.40 0.39 0.42 − − − − Example 5 0.44 0.46 0.45 0.49 − −− − Comp. Ex. 1 0.33 0.48 0.98 1.58 + + ++ ++ (precipitated) Comp. Ex. 20.39 0.52 1.06 1.62 + + ++ ++ (precipitated) Comp. Ex. 3 0.45 0.60 1.291.75 + + ++ ++ (precipitated) Comp. Ex. 4 0.63 0.81 1.59 2.03 + + ++ ++(precipitated)

The results in Table 1 indicate that in Examples 1, 2, 3 and 5 thatcontained combinations of octenylsuccinate starch, dextrin and glycerin,the aqueous dispersion was highly satisfactory compared to ComparativeExamples 1-4 that had one or two components of the combinations replacedwith other components, and their states of dispersion were alsosatisfactorily maintained during prolonged storage. In addition, themean particle sizes of the examples at the time of aqueous dispersionwere also satisfactorily maintained during prolonged storage. However,Comparative Examples 1-4 exhibited an increase in the mean particle sizeat the time of aqueous dispersion during prolonged storage, withprecipitation occurring within 6 weeks of storage and problems withaqueous dispersibility becoming apparent after prolonged storage.

These results confirmed that the composition of the disclosure has veryexcellent aqueous dispersibility even after prolonged storage, despiteits high coenzyme Q₁₀ content, and that the mean particle size at thetime of aqueous dispersion is also stably maintained.

Test Example 2 Coenzyme Q₁₀ Stability Test

The residual ratio of coenzyme Q₁₀ was measured in each of thedispersions obtained by dispersing 1 g of the powdered compositions ofExamples 1, 2, 3 and 5 and Comparative Examples 1 and 2 in 100 ml ofwater.

1) Storage Conditions

Storage temperature: 50° C.; sealed glass bottle, storage for 0-6 weeks

2) Measurement was Conducted by HPLC Under the Following Conditions.

Detector: Ultraviolet absorptiometer (measuring wavelength: 275 nm)Column: Hypersil ODS-5 4.6 mm×15 cm, Mobile phase: methanol/anhydrousethanol (13:7)

The residual ratios (%) are shown in Table 2, with 100% defined as theratio at the start of glass bottle packing.

TABLE 2 Storage period Sample Initial Week 2 Week 4 Week 6 Example 1100.0 99.9 98.0 97.8 Example 2 100.0 99.8 99.9 99.6 Example 3 100.0 98.897.7 97.7 Example 5 100.0 100.1  99.9 99.7 Comp. Ex. 1 100.0 97.9 93.988.9 Comp. Ex. 2 100.0 98.1 94.4 89.5

The results in Table 2 indicate that in Examples 1, 2, 3 and 5, thecoenzyme Q₁₀ in the composition was essentially resistant todecomposition even after prolonged storage, and was therefore stablymaintained. In Comparative Examples 1 and 2, however, the coenzyme Q₁₀residual ratios began to fall from 4 weeks after storage, reaching acoenzyme Q₁₀ loss of about 10% by the end of 6 weeks, and therefore thestorage stability was unsatisfactory. These results confirmed that thecomposition of the disclosure has notably superior coenzyme Q₁₀ storagestability despite its high coenzyme Q₁₀ content.

Test Example 3 Emulsion/Coenzyme Q₁₀ Stability Test

The coenzyme Q₁₀-containing powdered composition of Example 1 and thecoenzyme Q₁₀-containing powdered compositions of Comparative Examples 5,6, 7, 9, 10, 11 and 12 were evaluated for emulsion stability of thecomposition after redispersion in water and for coenzyme Q₁₀ stabilityin the compositions, in the same manner as in Test Examples 1 and 2. Theresults are shown in Tables 3 and 4 below.

TABLE 3 Storage period Sample Initial Week 2 Week 4 Week 6 Example 10.31 0.30 0.32 0.36 − − − − Comp. Ex. 5 0.64 0.88 1.43 1.91 + + ++ ++(precipitated) Comp. Ex. 6 0.81 0.98 1.29 1.78 + + ++ ++ (precipitated)Comp. Ex. 7 0.72 0.96 1.33 1.50 + + ++ ++ (precipitated) Comp. Ex. 90.75 0.82 1.56 2.12 + + ++ ++ (precipitated) (precipitated) Comp. Ex. 100.62 0.73 1.35 1.87 + + ++ ++ (precipitated) Comp. Ex. 11 0.55 0.71 1.331.88 + + ++ ++ (precipitated) Comp. Ex. 0.48 0.69 1.21 2.32 12 + + ++ ++(precipitated)

TABLE 4 Storage period Sample Initial Week 2 Week 4 Week 6 Example 1100.0 99.9 98.0 97.8 Comp. Ex. 5 100.0 96.8 92.9 89.5 Comp. Ex. 6 100.095.8 93.7 87.3 Comp. Ex. 7 100.0 96.1 93.9 89.7 Comp. Ex. 9 100.0 97.994.1 87.8 Comp. Ex. 10 100.0 98.1 94.4 88.4 Comp. Ex. 11 100.0 97.3 94.188.7 Comp. Ex. 12 100.0 96.2 93.8 88.5

The results in Tables 3 and 4 show that the compositions of ComparativeExamples 5, 6, 7, 9, 10, 11 and 12 had poor dispersion in water andincreased mean particle sizes during dispersion after prolonged storage,compared to the coenzyme Q₁₀-containing composition of the disclosure(Example 1). Also, precipitation occurred within 4-6 weeks of storage,and therefore the dispersion stability in water after prolonged storagewas unsatisfactory. In addition, the coenzyme Q₁₀ residual ratios beganto fall from 2-4 weeks after prolonged storage, reaching a content ofless than 90% by the end of 6 weeks, and therefore the coenzyme Q₁₀storage stability was unsatisfactory.

Test Example 4 Absorption Test

The powder obtained in Example 1 and the coenzyme Q₁₀-containing powderobtained in Comparative Example 3 were filled into hard capsules andsupplied for an absorption test. Specifically, two groups of beagles(male), with three in each group, were force-fed a single dose of 90mg/dog of coenzyme Q₁₀. Blood was sampled at predetermined times up to24 hours after feeding, and the time-dependent changes of coenzyme Q₁₀plasma concentration were examined. The beagles were starved from 5:00pm on the previous day with supply of water alone, and on the day of thetest were force-fed a capsule with 100 ml of water, without morningfeeding.

The coenzyme Q₁₀ was measured by HPLC under the following conditions.Since oxidized and reduced forms of coenzyme Q₁₀ are present in theserum, the total of both was calculated.

Column: Nucleosil 5C18 4.6 mm×25 cmMobile phase: ethanol:acetonitrile (55:45)Flow rate: 1 ml/minDetector: Ultraviolet spectrophotometer, 275 nmTemperature: 35° C., Injection volume: 5 μL

Each obtained coenzyme Q₁₀ blood concentration was used to determine themaximum blood concentration, time to maximum blood concentration andarea under the blood concentration-time curve, as pharmacokineticparameters. The results are shown in Table 5 below.

TABLE 5 AUC (0→t) Cmax (μg/ml) tmax (hr) (μg/hr/ml) Example 1 0.917 ±0.98 6.0 ± 1.8 8.31 ± 0.47 Comp. Ex. 3 0.362 ± 0.87 6.3 ± 2.4 3.12 ±0.63 (Mean ± S.D.) Cmax (μg/ml): Maximum blood concentration tmax (hr):Time at which maximum blood concentration reached AUC (0→t)(μg/hr/ml):Area under blood concentration-time curve

The results of this absorption test confirmed that, based on coenzymeQ₁₀ plasma concentration, the composition of Example 1 allows a highlevel of coenzyme Q₁₀ to be absorbed in the body reliably even whenorally administered after fasting, as compared to the composition ofComparative Example 3. This demonstrated that the composition of thedisclosure has highly superior bioavailability.

Example 8

After mixing 430 g of soybean oil (Yoshihara Seiyu) and 20 g of glycerinfatty acid ester (Riken Vitamin Co., Ltd.), the mixture was heated toabout 65° C. for dissolution. It was then cooled to room temperature,150 g of the powdered composition of Example 2 was added, and themixture was stirred to prepare a filling solution. The filling solutionwas used to prepare soft capsules with 300 mg per capsule by an ordinarysoft capsule forming procedure. The capsules contained 30 mg of coenzymeQ₁₀.

Example 9

After mixing 100 g of L-carnitine/L-tartrate, 260 g of crystallinecellulose (Asahi Kasei Corp.), 80 g of lactose (DMV International) and10 g of HPC (hydroxypropyl cellulose) (Nippon Soda Co., Ltd.), themixture was kneaded for 5 minutes in a kneader with 80 mL of ethanol byan ordinary method. Upon completion of the kneading, the mixture waspassed through a 10 mesh filter and dried at 50° C. with a drier. Afterdrying, it was granulated to obtain granules. To the granules there wasadded 150 g of the powdered composition of Example 2 to obtain acoenzyme Q₁₀-containing granule product. The granules were stick-packedat 1.2/pack, to obtain granules containing 120 mg of coenzyme Q₁₀ perstick.

Example 10

After mixing 222 g of crystalline cellulose (Asahi Kasei Corp.), 200 gof lactose (DMV International) and 18 g of HPC (hydroxypropyl cellulose)(Nippon Soda Co., Ltd.), the mixture was kneaded for 5 minutes in akneader with 130 mL of ethanol by an ordinary method. Upon completion ofthe kneading, the mixture was passed through a 16 mesh filter and driedat 50° C. with a drier. After drying, it was granulated to obtaingranules. To the granules there was added 10 g of sucrose fatty acidester (Mitsubishi Chemical Corp.), and after mixing for 1 minute, 150 gof the powdered composition of Example 2 was added and mixing wascontinued to prepare a tableting powder. The powder was tableted using atableting machine to prepare tablets at 300 mg each. The tabletscontained 30 mg of coenzyme Q₁₀ per tablet.

Example 11

After mixing 250 g of the powdered composition obtained in Example 2,580 g of crystalline cellulose (Asahi Kasei Corp.) and 130 g of reducedmaltose (Nikken Fine Chemicals Co., Ltd.), there was added 40 g ofsucrose fatty acid ester (Mitsubishi Chemical Corp.) and the componentswere mixed to prepare a tableting powder. The powder was tableted usinga tableting machine to prepare tablets at 500 mg each. The tabletscontained 50 mg of coenzyme Q₁₀ per tablet.

Example 12

After stirring 1.0 g of citric acid (Tanabe Seiyaku Co., Ltd.) and 200 gof glucose solution (Nihon Shokuhin Kako Co., Ltd.) in 649 g of purifiedwater until dissolution, the pH was adjusted to 3.0-3.5. There was thenadded 150 g of the powdered composition of Example 2 to dissolution toobtain a homogeneous beverage composition containing coenzyme Q₁₀.

Example 13

Through a 16 mesh filter there were passed 225 g of the powderedcomposition of Example 2, 15 g of vitamin B₁, 30 g ofL-carnitine/L-tartrate, 390 g of crystalline cellulose (Asahi KaseiCorp.), 230 g of lactose 200M (DMV International) and 10 g of citricacid (Tanabe Seiyaku Co., Ltd.), to obtain a powder. The powder wasfilled into No. 2 hard capsules at about 300 mg per capsule (30 mgcoenzyme Q₁₀ content per capsule) to obtain coenzyme Q₁₀-containing hardcapsules.

Example 14

There were combined 120 g of wheat flour (strong flour) and 2 g of dryyeast. Also, 2.5 g of the powdered composition of Example 2, 20 g ofsugar, 3 g of salt and 6 g of skim milk powder were dissolved in 70 g ofhot water, one egg was added and the mixture was thoroughly stirred,after which 8 g of malic acid was added and stirring was continued. Themixture was added to wheat flour and thoroughly kneaded by hand, afterwhich about 40 g of butter was added prior to further kneading to obtaindough for 20 bread rolls. After subsequent fermentation, lightly beatenegg was spread over the surface and the dough was baked for about 12minutes in an oven at 180° C. to obtain bread rolls. The bread rollscontained about 50 mg of coenzyme Q₁₀ each.

Example 15

There were mixed 200 g of wheat flour (strong flour) and 4 g of dryyeast. In addition, 2.5 g of the powdered composition of Example 2, 10 gof sugar, 4 g of salt, 10 g of skim milk and 15 g of shortening weredissolved in 150 g of water, and both were thoroughly mixed. Aftersubsequent fermentation, the mixture was baked for about 15 minutes inan oven at 150° C. to produce 10 bread loaves. The bread loavescontained about 1000 mg of coenzyme Q₁₀ each.

Example 16

One serving of pasta meat sauce (150 g) was placed in a pot, and then150 mg of the powdered composition of Example 2 (corresponding to 60 mgof coenzyme Q₁₀) was added and the mixture was stirred while heating toobtain pasta meat sauce containing coenzyme Q₁₀. The sauce was filledinto a pouch, and then the pouch was sealed with nitrogen replacementand sterilized at 121° C. for 15 minutes to obtain coenzymeQ₁₀-containing pasta meat sauce.

Example 17

After adding two of the coenzyme Q₁₀-containing soft capsules producedin Example 8 (corresponding to 60 mg of coenzyme Q₁₀) to two “go”volumes of rice, it was boiled with a sufficient amount of water andfilled into a retort pouch according to a common method, after which thepouch was sealed with nitrogen replacement and sterilized at 121° C. for15 minutes to obtain retort boiled rice. The retort boiled ricecontained about 30 mg of coenzyme Q₁₀ per serving, and had asatisfactory appearance, taste and texture.

Example 18

After dispersing 375 mg of the powdered composition of Example 2 and 15g of salt in 150 g of water, the dispersion was thoroughly kneaded with300 g of wheat flour (all-purpose flour) and allowed to stand. Next, thedough was spread and cut to a width of about 5 mm to produce threeservings of noodles. These were then boiled for about 10 minutes inboiling water, yielding noodles with a satisfactory appearance, tasteand texture. The noodles contained about 50 mg of coenzyme Q₁₀ perserving.

Example 19

After mixing 200 mL of milk, 4.5 g of gelatin, 45 g of sugar and 15 g ofwater, the mixture was heated on a flame for complete dissolution of thegelatin. After confirming dissolution, 0.3 g of the powdered compositionof Example 2 (0.12 g of coenzyme Q₁₀) was thoroughly mixed and dissolvedtherewith. The mixture was then poured into four cups and cooled tohardness for at least 2 hours in a refrigerator to obtain milk jelly.The milk jelly contained about 30 mg of coenzyme Q₁₀ per cup.

Example 20

Upon thoroughly mixing 15 g of the powdered composition of Example 2 and585 g of powdered organic aojiru (Nisshin Pharma Inc.), there wasobtained stick packs containing approximately 3 g per serving.

The powdered aojiru contained about 30 mg of coenzyme Q₁₀ per stick.

Example 21

A beverage was obtained by dissolving 1.5 g of the powdered compositionof Example 2 in 1 L of oolong tea. The tea contained about 60 mg ofcoenzyme Q₁₀ per 100 mL.

INDUSTRIAL APPLICABILITY

According to the present disclosure there is provided a coenzymeQ₁₀-containing composition having a high coenzyme Q₁₀ content andexcellent coenzyme Q₁₀ stability and bioavailability (absorption,bioutility, etc.) without using synthetic emulsifiers such as glycerinfatty acid esters. A liquid composition of the disclosure can maintain asatisfactory emulsified state even with prolonged storage, despite itshigh coenzyme Q₁₀ content. Furthermore, a solid composition of thedisclosure is suitable as it can form a fine and stable aqueouscomposition by addition to an aqueous liquid such as water without lossof dissolution or dispersion properties in the aqueous liquid, even whenstored for prolonged periods. It is a feature of the composition that itallows reliable absorption of coenzyme Q₁₀ even on an empty stomach.Consequently, the composition of the disclosure can be added andcombined with various forms of foods and drinks, drugs, cosmetics andfeeds to provide high bioavailability of coenzyme Q₁₀.

1. A coenzyme Q₁₀-containing solid composition, wherein said coenzymeQ₁₀-containing solid composition is produced by the following steps: a)dispersing and emulsifying: 1-50 wt % of coenzyme Q₁₀; 0.01-10 wt % ofglycerin; 4-30 wt % of octenylsuccinate starch and dextrin; and 40-94 wt% of water, thereby forming an emulsified coenzyme Q₁₀-containing liquidcomposition, wherein said emulsified coenzyme Q₁₀-containing liquidcomposition comprises dispersed and emulsified particles containingcoenzyme Q₁₀ that form a homogeneous emulsion, and wherein saidparticles containing coenzyme Q₁₀ have a mean particle size that is nogreater than 3 μm; and b) drying said coenzyme Q₁₀-containing liquidcomposition formed in step (a), to form said coenzyme Q₁₀-containingsolid composition.
 2. The coenzyme Q₁₀-containing solid compositionaccording to claim 1, comprising: 3-80 wt % of coenzyme Q₁₀; 0.01-25 wt% of glycerin; and 19-96 wt % of octenylsuccinate starch and dextrin. 3.The coenzyme Q₁₀-containing solid composition according to claim 1,wherein said particles containing coenzyme Q₁₀ in said coenzymeQ₁₀-containing solid composition maintain a mean particle size that isno greater than 3 μm after re-dispersion in water.
 4. The coenzymeQ₁₀-containing solid composition according to claim 1, wherein saidparticles containing coenzyme Q₁₀ have a mean particle size that is nogreater than 0.8 μm.
 5. The coenzyme Q₁₀-containing solid compositionaccording to claim 4, wherein said particles containing coenzyme Q₁₀ insaid coenzyme Q₁₀-containing solid composition maintain a mean particlesize that is no greater than 0.8 μm after re-dispersion in water.
 6. Thecoenzyme Q₁₀-containing solid composition according to claim 1, whereinsaid particles containing coenzyme Q₁₀ in said coenzyme Q₁₀-containingsolid composition are readily water-soluble.
 7. The coenzymeQ₁₀-containing solid composition according to claim 1, wherein theamount of coenzyme Q₁₀ is 13-50 wt %.
 8. The coenzyme Q₁₀-containingsolid composition according to claim 1, wherein said particlescontaining coenzyme Q₁₀ in said coenzyme Q₁₀-containing solidcomposition have a residual ratio greater than 95% after re-dispersionin water and a storage period of six weeks.
 9. A food, pharmaceutical,cosmetic or feed containing a coenzyme Q₁₀-containing solid composition,wherein said coenzyme Q₁₀-containing solid composition is produced bythe following steps: a) dispersing and emulsifying: 1-50 wt % ofcoenzyme Q₁₀; 0.01-10 wt % of glycerin; 4-30 wt % of octenylsuccinatestarch and dextrin; and 40-94 wt % of water, thereby forming anemulsified coenzyme Q₁₀-containing liquid composition, wherein saidemulsified coenzyme Q₁₀-containing liquid composition comprisesdispersed and emulsified particles containing coenzyme Q₁₀ that form ahomogeneous emulsion, and wherein said particles containing coenzyme Q₁₀have a mean particle size that is no greater than 3 μm; and b) dryingsaid coenzyme Q₁₀-containing liquid composition formed in step (a), toform said coenzyme Q₁₀-containing solid composition.
 10. The food,pharmaceutical, cosmetic or feed according to claim 9, wherein saidcoenzyme Q₁₀-containing solid composition comprises: 3-80 wt % ofcoenzyme Q₁₀; 0.01-25 wt % of glycerin; and 19-96 wt % ofoctenylsuccinate starch and dextrin.
 11. A process for producing acoenzyme Q₁₀-containing solid composition, comprising: a) dispersing andemulsifying: 1-50 wt % of coenzyme Q₁₀ in an aqueous liquid containing0.01-10 wt % of glycerin; 4-30 wt % of octenylsuccinate starch anddextrin; and 40-94 wt % of water, to prepare a coenzyme Q₁₀-containingliquid composition; and b) drying said coenzyme Q₁₀-containing liquidcomposition prepared in step (a), to form said coenzyme Q₁₀-containingsolid composition.
 12. The process for producing the coenzymeQ₁₀-containing solid composition according to claim 11, wherein saidcoenzyme Q₁₀-containing solid composition comprises: 3-80 wt % ofcoenzyme Q₁₀; 0.01-25 wt % of glycerin; and 19-96 wt % ofoctenylsuccinate starch and dextrin.